Question

State the relation btwn:
1) kWh and J
2) eV and J​

Answer 1

1) 1 KWh is defined as the 1000 J energy is used in 1 hour.

Mathematically, 1 KWh=3.6×10⁶ J/s

2) When used as a unit of energy, the numerical value of 1 eV in joules (symbol J) is equivalent to the numerical value of the charge of an electron in coulombs (symbol C). Under the 2019 redefinition of the SI base units, this sets 1 eV equal to the exact value 1.602176634×10−19 J.

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